Question
Physics Question on Surface tension
The surface tension of a liquid at its boiling point is
A
Maximum
B
Zero
C
Same as at room temperature
D
Minimum but more than zero
Answer
Zero
Explanation
Solution
As the temperature increases, surface tension decreases. At the boiling point, every molecule of a liquid are in motion from bottom to surface, and due to rise in temperature, molecules lose the adhesion and hence, surface tension becomes zero.